<template>
  <div id='report'>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>
<script>
  // 1.导入echarts
  import echarts from 'echarts'
  import _ from 'lodash'

  export default {
    name: 'report',
    data() {
      return {
        //   需要和后端返回的图标合并的数据
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [{
            boundaryGap: false
          }],
          yAxis: [{
            type: 'value'
          }]
        }
      }
    },
    created() {},
    // mounted()声明周期函数执行时dom元素已经渲染完毕
    async mounted() {
      // 3.基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'));

      await this.$http.get(`reports/type/1`).then(res => {
        if (res.data.meta.status === 200) {
            // 4.准备数据和配置项
            // merge()用于合并两个对象
            const result = _.merge(res.data.data,this.options)
          //   5.使用刚指定的配置项和数据显示图表
          myChart.setOption(result);
        } else {
          this.$message({
            type: 'error',
            message: res.data.meta.msg,
            duration: 2000
          })
        }
      })
    },
    methods: {},
  }

</script>
<style scoped>
</style>
